1、ETS I TS 1 02 1 1 5-2 VI .I .I (2002-10) Technical Specificafion Broadband Radio Access Networks (BRAN); HIPERACCESS; Cell based Convergence Layer; Part 2: UNI Service Specific Convergence Sublayer (SSCS) 2 ETSI TS 102 115-2 V1.l.l (2002-10) Reference DTSIBRAN-0034003-2 Keywords access, ATM, broadba
2、nd, HIPERACCESS, radio ETSI 650 Route des Lucioles F-O6921 Sophia Antipolis Cedex - FRANCE Tel.: +33 4 92 94 42 O0 Fax: +33 4 93 65 47 16 Siret No 348 623 562 00017 - NAF 742 C Association but non lucratif enregistre la Sous-prfecture de Grasse (06) No 7803/88 Important notice Individual copies of t
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6、on extend to reproduction in all media. O European Telecommunications Standards Institute 2002. All rights reserved. DECTTM, PLUGTESTSTMand UMTSTMare Trade Marks of ETSI registered for the benefit of its Members. TIPHONTM and the TIPHON logo are Trade Marks currently being registered by ETSI for the
7、 benefit of its Members. 3GPPTM is a Trade Mark of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners. ETSI 3 ETSI TS 102 115-2 V1.l.l (2002-10) Contents Intellectual Property Rights . .4 Foreword . 4 1 2 3 3.1 3.2 4 5 5.1 5.2 5.3 5.3.1 5.3.2 5.3.3 5.3.4 5.4 5.5 5
8、.5.1 6 7 7.1 7.1.1 7.1.2 7.1.3 7.1.4 7.2 Scope 5 References . .5 Definitions and abbreviations. . .6 . 6 . 6 Convergence Layer architecture . 7 Cell based Convergence Layer . 7 . 7 . 9 ATM signalling interface UNI Service Specific Part Co layer . 9 Functional model . . 9 . 10 . 11 . 12 Service Acces
9、s Po . 13 Primitives . . 13 . 13 DLC connection establishment 14 Convergence Layer specific parameters .14 Definitions . Abbreviations General Information elements for Cell based SSCS ATM VC Identifier range . Number of supported ATM connections ATM connection identifiers ATM parameters . 15 Interfa
10、ce to the DLC. 14 14 15 15 15 Annex A (informative): Annex B (informative): ATM information elements . 16 Bibliography . 18 History . .19 ETSI 4 ETSI TS 102 115-2 V1.l.l (2002-10) Intellectual Property Rights IPRs essential or potentially essential to the present document may have been declared to E
11、TSI. The information pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found in ETSI SR O00 3 14: “Intellectual Property Rights (7PRs); Essential, orpotentially Essential, IPRs notlJied to ETSI in respect ofETSI standards“, which is availa
12、ble from the ETSI Secretariat. Latest updates are available on the ETSI Web server (5). Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee can be given as to the existence of other IPRs not referenced in ETSI SR O00 3 14 (or the upda
13、tes on the ETSI Web server) which are, or may be, or may become, essential to the present document. Foreword This Technical Specification (TS) has been produced by ETSI Project Broadband Radio Access Networks (BRAN). The Cell based Convergence Layer is split into several parts. Part 1, Common Part,
14、describes the functionality for mapping ATM cells into data units used at the Data Link Control (DLC) layer. Further parts, each defining a Service Specific Convergence Sublayer (SSCS), describe the control plane functionality required to support a specific signalling protocol, e.g. ATMFs M-UNI prot
15、ocol specification 3. It is envisioned that several, independent, service specific parts will be added as market requirements develop in the future. The present document is part 2 of a multi-part deliverable covering the HIPERACCESS; Cell based Convergence Layer, as identified below: Part 1 : “Commo
16、n Part“; Part 2: “UNI Service Specific Convergence Sublayer (SSCS)“. ETSI 5 ETSI TS 102 115-2 V1.l.l (2002-10) 1 Scope The present document describes the intenvorking between UNI signalling protocols and the HIPERACCESS control plane. The present document is applicable to HIPERACCESS equipments that
17、 optionally support ATM UNI signalling according to one of the following UNI standard recommendations: ITU-T Recommendation Q.293 1 2, ATMF UNI 3.1 3, ATMF UNI 4.0 4 and M-UNI (see bibliography). The present document addresses only the functionality required to map ATM UNI signalling over the HIPERA
18、CCESS network, i.e. between an HIPERACCESS Access Point and Access Terminal. It does not address the requirements and technical characteristics for wired network interfaces at the Access Point and at the Access Terminal. The Cell based Convergence Layer consists of a Common Part Convergence Sublayer
19、 5 and several Service Specific Convergence Sublayers (SSCS), which are defined in separate documents. The task of the Common Part of the Cell based Convergence Layer is to map between the fixed data unit of an ATM cell and the fixed data unit size used in the HIPERACCESS DLC layer i. The Service Sp
20、ecific Convergence Sublayers all use services provided by the Common Part Convergence Sublayer 5 and the HIPERACCESS Data Link Control (DLC) layer i. The present document does not address the requirements and technical characteristics for type approval and conformance testing. These are covered by s
21、eparate documents. 2 References The following documents contain provisions which, through reference in this text, constitute provisions of the present document. References are either specific (identified by date of publication andor edition number or version number) or non-specific. For a specific r
22、eference, subsequent revisions do not apply. For a non-specific reference, the latest version applies. il ETSI TS 102 000: “Broadband Radio Access Networks (BRAN); HIPERACCESS; DLC protocol specification“. ITU-T Recommendation Q.293 1 (1995): “Digital Subscriber Signalling System No. 2 - User-Networ
23、k Interface (UNI) layer 3 specification for basic callkonnection control“. ATM Forum (af-uni-O0 10.000): “ATM User-Network Interface Specification V2.0“. ATM Forum (af-sig-0061,000): “UNI Signalling 4.0“. ETSI TS 102 115-1: “Broadband Radio Access Networks (BRAN); HIPERACCESS; Cell based Convergence
24、 Layer; Part 1 : Common Part“. ATM Forum (af-lane-0084.000): “LANE v2.0 LUNI Interface“. IETF RFC 1577: “Classical IP and ARP over ATM“. ATM Forum (af-mpoa-0114,000): “Multi-protocol Over ATM Specification, Version 1.1“. 21 31 41 51 61 71 SI 91 lo1 i 11 IETF RFC 2364: “PPP over AALS“. IETF RFC 1755:
25、 “ATM Signalling Support for IP over ATM“. ETSI TS 101 999: “Broadband Radio Access Networks (BRAN); HIPERACCESS; PHY protocol specification“. ETSI 6 ETSI TS 102 115-2 V1.l.l (2002-10) 3 3.1 Definitions and abbreviations Definitions For the purposes of the present document, the following terms and d
26、efinitions apply: HIgh PErformance Radio ACCESS (HIPERACCESS): broadband fixed wireless access system above 11 GHz standardized by ETSI Project BRAN Protocol Data Unit (PDU): data unit exchanged between entities at the same IS0 layer Service Data Unit (SDU): data unit exchanged between adjacent IS0
27、layers 3.2 Abbreviations For the purposes of the present document, the following abbreviations apply: AP AT ATM BRAN CPCS CPE DLC MPOA PPP RLC SAP sscs TE UNI vc VCI VP VPI Access Point Access Terminal Asynchronous Transfer Mode Broadband Radio Access Networks Common Part Convergence Sublayer Custom
28、er Premises Equipment Data Link Control Multi Protocol over ATM Point-to-Point Protocol Radio Link Control Service Access Point Service Specific Convergence Sublayer Terminal Equipment User Network Interface Virtual Channel Virtual Channel Identifier Virtual Path Virtual Path Identifier ETSI 7 ETSI
29、TS 102 115-2 V1.l.l (2002-10) 4 Convergence Layer architecture The Convergence Layer (CL) resides on top of the Data Link Control (DLC) layer. The task of the Convergence Layer is to adapt the service requirements of different Higher Layers to the services offered by the HIPERACCESS DLC layer. Highe
30、r Layers v v Convergence Lam I Figure 4.1 : HIPERACCESS Convergence Layers 5 5.1 Cell based Convergence Layer General The Cell based Convergence Layer provides the capability to transfer User Service Data Units (User SDUs), that correspond to an ATM cell, transparently between users of the Convergen
31、ce Layer. The Cell based CL itself consists of two parts, a Common Part Convergence Sublayer (CPCS) 5 and a Service Specific Convergence Sublayer (SSCS). It is intended that several different Service Specific Convergence Sublayers will be specified within BRAN. An Access Point may support several SS
32、CSs simultaneously. The CPCS describes the user plane functionality, i.e. how the information contained in an ATM cell is mapped into a HIPERACCESS DLC transport unit (SDU) and vice versa. The CPCS performs the adaptation between the User SDU and the DLC-SDU. User SDUs belonging to different ATM con
33、nections can be multiplexed on one DLC connection. Multiple DLC connections can be set up. ETSI 8 ETSI TS 102 115-2 V1.l.l (2002-10) Applications UNI signalling AAL5 ATM Figure 5.1: Protocol profile for Cell based Convergence Layer on ATM data transport (scope of HIPERACCESS specifications shaded in
34、 grey) Figure 5.1 shows a protocol profile for the Cell based Convergence Layer that uses ATM for basic data transport. The application interfaces with the ATM user plane comprising of AAL5 and ATM layer and the ATM control plane using the UNI signalling protocols. User plane and control plane data
35、are encapsulated into AAL5 frames, which are segmented into ATM cells for further transport. The Common Part Convergence Sublayer of the Cell based CL adapts the ATM cell format to the DLC-SDU of HA. The ATM control plane functionality, like connection control, is handled by the UNI signalling proto
36、cols. The UNI Service Specific Part of the Cell based CL translates UNI control plane functions into the corresponding HA control plane functions. The network model is shown in figure 5.2. HIPERACCESS Access Terminals (HA ATs) are attached to an ATM network via a HIPERACCESS Access Point (HA AP). Th
37、e data transfer between ATs and the AP is cell based (ATM). Applications running at the AT or at the CPEs that are attached to the ATM-network communicate via ATM. Additional protocols like LANE 6, Classical IP 7 MPOA SI, or PPP 9 may be invoked by the communicating applications. These protocols use
38、 services provided by the ATM transport network and are negotiated during connection establishment phase. HIPERACCESS / Fixed Wireless Access Wireless Port ATM Network tch Figure 5.2: HIPERACCESS supporting ATM transport ETSI 9 private NNI ETSI TS 102 115-2 V1.l.l (2002-10) public NNI 5.2 private ne
39、twork ATM signalling interface public NNI public network User-to-Network (UNI) signalling is used to dynamically establish, maintain, and terminate connections at the edge of the network between an ATM end station and a publidprivate network. Figure 5.3 shows the B-ISDN signalling interfaces between
40、 the private, public networks and the ATM TES. Nevertheless, the present document concentrates on the principles of the private UNI interface between the ATM TE and the HA system - private network. 5.3 UNI Service Specific Part Convergence Sublayer 5.3.1 Functional model The UNI Service Specific Con
41、vergence Sublayer is a part of the Cell based Convergence Layer. It provides the adaptation of the ATM User Network Interface (UNI) signalling to the Radio Link Control (RLC) functions of HIPERACCE S S. It is assumed that standard UNI signalling is used for ATM connection control management 3, 4. Th
42、e AT relays the signalling traffic transparently. The AP may act as signalling endpoint/instance for UNI signalling or may relay signalling traffic transparently to a signalling entity within the network, e.g. the ATM-switch the Al is attached to. The location of the SSCS in a specific entity, e.g.
43、Al or ATM-switch, is implementation specific and therefore not specified within HA. pr,ivate/public network HiperAccess AT AP ATM TE ATM Network j BRAN HA resource mgmt public private UNI NNI _ sign _-_-_-_- instance instance instance Figure 5.4: Interaction of ATM signalling and DLC layer ETSI 10 E
44、TSI TS 102 115-2 V1.l.l (2002-10) The AT is transparent for the ATM signalling messages (see figure 5.4). The AT provides only pre-established CIDs, one per independent ATM TE in case of multi-dwelling, to transport the signalling messages to the AP. From the ATM signalling perspective the private U
45、NI interfaces of the ATM TE is directly connected to the AP signalling stack. The Ap Hiperaccess resource management performs the traffic resource and QoS parameter decisions and translates these parameters into DLC corresponding parameters. The DLC layer is forced to setup these parameter values (C
46、ID etc.) in the AP and AT DLC layer. This approach requires also that the ATM/AAL layer parameters are transported via the DLC messages to the AT. 5.3.2 Cell based Convergence Layer planes Figure 5.5 shows the protocol layers and the model of the planes for ATM-transport in HIPERACCESS. Three planes
47、 are distinguished: User Plane; ATM Control Plane; HIPERACCESS Control Plane. I ATM Layer I User Plane I ATM Layer I I UNI - Signaling /“I -Signaling I I ATM Adaptation Layer I I I UNI -Signaling I HA Control Plane HIPERACCESS Access Terminal HIPERACCESS Access Point Figure 5.5: Protocol stacks in t
48、he AT and the AP I bridging I I ATM Adaptation Layer Network specific protocol, out of scope I ATM Layer I hletwork specific Layer 3 protocol, out of scope tl UNI-Sign. I ATM Adaptation Layer I I ETSI 11 ETSI TS 102 115-2 V1.l.l (2002-10) Plane Table 5.1 lists the protocol layers as shown in figure
49、5.5 and their respective functions. Protocol Laver Function Table 5.1: Layer Description Convergence Sub layer HIPERACCESS DLC Layer HIPERACCESS PHY Laver DLC transport format See I See II 11 IATM AdaDtation Laver (AAL IATM Seamentation and Reassemblv ATM Control Plane HI PERACCESS Control Plane ATM IATM cell transport Cell based - Common Part ladaptation between ATM-cell stream and HIPERACCESS LA Layer 3 protocol UNI signalling protocol Signalling VC Cell based UNI Servi
